US20110060089A1 - Thermoplastic resin composition, and molded article - Google Patents

Thermoplastic resin composition, and molded article Download PDF

Info

Publication number
US20110060089A1
US20110060089A1 US12/991,291 US99129109A US2011060089A1 US 20110060089 A1 US20110060089 A1 US 20110060089A1 US 99129109 A US99129109 A US 99129109A US 2011060089 A1 US2011060089 A1 US 2011060089A1
Authority
US
United States
Prior art keywords
mass
resin composition
thermoplastic resin
component
group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/991,291
Other languages
English (en)
Inventor
Yusuke Hayata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idemitsu Kosan Co Ltd
Original Assignee
Idemitsu Kosan Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Idemitsu Kosan Co Ltd filed Critical Idemitsu Kosan Co Ltd
Assigned to IDEMITSU KOSAN CO., LTD. reassignment IDEMITSU KOSAN CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAYATA, YUSUKE
Publication of US20110060089A1 publication Critical patent/US20110060089A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08L27/18—Homopolymers or copolymers or tetrafluoroethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes

Definitions

  • the present invention relates to a thermoplastic resin composition and a molded article, and more specifically, to a thermoplastic resin composition which is suitable as, for example, parts for OA instruments, electrical and electronic instruments, and communication instruments, has excellent flame retardancy and excellent impact resistance, and is excellent in chemical resistance and heat resistance and provides a molded article having a good external appearance, and a molded article of the thermoplastic resin composition.
  • Polycarbonates have been frequently utilized in an automobile field, and electrical and electronic fields because of their excellent heat resistance and excellent impact resistance.
  • thinning has been progressing as a result of the weight reduction of a product, and a blend of a polycarbonate and an ABS resin or AS resin has gone mainstream in order that the fluidity of the polycarbonate may be improved.
  • Blending the ABS resin can improve not only the fluidity but also the impact resistance and chemical resistance.
  • the chemical resistance can be improved by turning a polyester and the polycarbonate into an alloy.
  • Patent Documents 1 and 2 For example, a technology involving adding a phosphate to a resin composition formed of a polycarbonate and a polylactic acid to improve flame retardancy has been proposed (see, for example, Patent Documents 1 and 2).
  • the addition of the phosphate reduces the heat resistance of the resin composition, and hence concerns are raised about deformation at the time of molding and long-term heat resistance. Further, there is a problem in that an external appearance failure occurs due to generation of gas upon molding.
  • An object of the present invention is to provide a thermoplastic resin composition which has remarkably improved flame retardancy and remarkably improved impact resistance without using any flame retardant agent, is excellent in chemical resistance and heat resistance and provides a molded article having a good external appearance, and a molded article using the thermoplastic resin composition.
  • the inventors of the present invention have made extensive studies to achieve the above object. As a result, the inventors have found that the above object can be achieved by compounding a specific amount of a functional group-containing silicone compound into a resin composition based on an aromatic polycarbonate resin and an aliphatic polyester. The present invention has been completed on the basis of such finding.
  • the present invention provides the following thermoplastic resin composition and molded article.
  • thermoplastic resin composition comprising a combination of 5 to 89.95 mass % of an aromatic polycarbonate resin (A), 5 to 60 mass % of an aliphatic polyester (B), 5 to 30 mass % of talc (C), 0.05 to 3 mass % of a functional group-containing silicone (D), and 0 to 2 mass % of polytetrafluorethylene (E) at a total content of the components (A) to (E) of 100 mass %, the thermoplastic resin composition being characterized in that a mass ratio of the component (D) to the component (B) is 0.003 to 0.6.
  • thermoplastic resin composition according to the above item 1, wherein the component (B) comprises at least one kind selected from a polylactic acid, copolymers of lactic acids and other hydroxycarboxylic acids, and a polybutylene succinate.
  • thermoplastic resin composition according to the above item 1 or 2 comprising 5 to 50 mass % of a silicone-copolymerized polycarbonate as the component (A).
  • thermoplastic resin composition according to the above item 3 wherein a silicone of the silicone-copolymerized polycarbonate comprises a polyorganosiloxane.
  • thermoplastic resin composition obtained by using the thermoplastic resin composition according to any one of the above items 1 to 4.
  • a casing for an OA instrument, electrical and electronic instrument, or communication instrument the casing being obtained by using the thermoplastic resin composition according to any one of the above items 1 to 4.
  • thermoplastic resin composition having remarkably improved flame retardancy and remarkably improved impact resistance without using any flame retardant agent, and excellent in chemical resistance and heat resistance
  • a molded article using the thermoplastic resin composition by compounding an aliphatic polyester and a functional group-containing silicone compound at a specific ratio into a resin composition based on an aromatic polycarbonate resin and an aliphatic polyester.
  • a molded article having a good external appearance by an interaction between the functional group-containing silicone compound and the aliphatic polyester there can be provided.
  • FIG. 1 is a perspective view of a test piece-mounting jig for evaluating a composition of the present invention for its chemical resistance.
  • thermoplastic resin composition of the present invention is a resin composition comprising an aromatic polycarbonate resin (A), an aliphatic polyester (B), talc (C), a functional group-containing silicone compound (D), and as required, polytetrafluoroethylene (E), and being characterized in that amass ratio of the component (D) to the component (B) is 0.003 to 0.6.
  • thermoplastic resin composition of the present invention is a resin composition containing the aromatic polycarbonate resin (A) (which may hereinafter be abbreviated as “aromatic PC resin”).
  • the component (A) of the present invention is an aromatic PC resin having a terminal group represented by the following general formula (1).
  • R 1 represents an alkyl group having 1 to 35 carbon atoms
  • the alkyl group may be linear or branched, and its bonding position, which may be any one of para, meta, and ortho positions, is preferably the para position, and a represents an integer of 0 to 5.
  • the aromatic PC resin has a viscosity-average molecular weight of typically 10,000 to 40,000, preferably 13,000 to 30,000 in terms of the impartment of heat resistance, flame retardancy, and impact resistance, or more preferably 15,000 to 24,000.
  • the aromatic polycarbonate having the terminal group represented by the above general formula (1) can be easily produced by causing a dihydric phenol and phosgene or a carbonate compound to react with each other. That is, the aromatic polycarbonate is produced by, for example, a reaction between the dihydric phenol and a carbonate precursor such as phosgene or an ester exchange reaction between the dihydric phenol and a carbonate precursor such as diphenyl carbonate in a solvent such as methylene chloride in the presence of a catalyst such as triethylamine and a specific terminal stopper.
  • Examples of the dihydric phenol include compounds each represented by the following general formula (2).
  • R 2 and R 3 each represent an alkyl group having 1 to 6 carbon atoms or a phenyl group, and may be identical to or different from each other.
  • Z represents a single bond, an alkylene group having 1 to 20 carbon atoms, an alkylidene group having 2 to 20 carbon atoms, a cycloalkylene group having 5 to 20 carbon atoms, a cycloalkylidene group having 5 to 20 carbon atoms, or a —SO 2 —, —SO—, —S—, —O—, or —CO— bond, or preferably an isopropylidene group, and b and c each represent an integer of 0 to 4, or preferably 0.
  • Examples of the above-mentioned dihydric phenol represented by the general formula (2) include: 4,4′-dihydroxydiphenyl; bis(4-hydroxyphenyl)alkanes such as 1,1-bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxyphenyl)ethane, and 2,2-bis(4-hydroxyphenyl)propane; bis(4-hydroxyphenyl)cycloalkane; bis(4-hydroxyphenyl)oxide; bis(4-hydroxyphenyl)sulfide; bis(4-hydroxyphenyl)sulfone; bis(4-hydroxyphenyl)sulfoxide; bis(4-hydroxyphenyl)ketone; and the like. Of those, 2,2-bis(4-hydroxyphenyl)propane (bisphenol A) is preferred.
  • the dihydric phenol may be a homopolymer using one kind of the above dihydric phenols, or may be a copolymer using two or more kinds of them. Further, a thermoplastic, randomly branched polycarbonate obtained by using a polyfunctional aromatic compound and any one of the above dihydric phenols in combination is permitted.
  • Examples of the carbonate compound include: diaryl carbonates such as diphenyl carbonate; and dialkyl carbonates such as dimethyl carbonate and diethyl carbonate.
  • a phenol compound from which the terminal group represented by the general formula (1) is formed that is, a phenol compound represented by the following general formula (3) has only to be used as the terminal stopper.
  • R 1 and a each have the same meaning as that described above.
  • phenol compound examples include phenol, p-cresol, p-tert-butylphenol, p-tert-pentylphenol, p-tert-octylphenol, p-cumylphenol, p-nonylphenol, dococylphenol, tetracocylphenol, hexacocylphenol, octacocylphenol, triacontylphenol, dotriacontylphenol, tetratriacontylphenol, or the like.
  • One kind of the phenol compounds may be used alone, or two or more kinds thereof may be used in combination. In addition, any one of those phenol compounds may be used in combination with, for example, any other phenol compound as required.
  • aromatic polycarbonate produced by the above method practically has the terminal group represented by the general formula (1) at one terminal, or each of both terminals, of any one of its molecules.
  • the aromatic PC resin as the component (A) preferably contains a silicone-copolymerized polycarbonate.
  • the silicone of the silicone-copolymerized polycarbonate is preferably a polyorganosiloxane in terms of improvements in heat resistance, flame retardancy, and impact resistance.
  • aromatic PC—POS copolymer an aromatic polycarbonate-polyorganosiloxane copolymer (which may hereinafter be abbreviated as “aromatic PC—POS copolymer”)
  • the POS is more preferably a polydimethylsiloxane.
  • the aromatic PC—POS copolymer has a terminal group represented by the following general formula (4), and examples of the copolymer include copolymers disclosed in JP 50-29695 A, JP 03-292359 A, JP 04-202465 A, JP 08-81620 A, JP 08-302178 A, and JP 10-7897 A.
  • an alkyl group having 1 to 35 carbon atoms represented by R 4 may be linear or branched, and its bonding position, which may be any one of para, meta, and ortho positions, is preferably the para position, and d represents an integer of 0 to 5.
  • Preferred examples of the aromatic PC—POS copolymer include copolymers each having, in any one of its molecules, a polycarbonate segment formed of a structural unit represented by the following general formula (5) and a polyorganosiloxane segment formed of a structural unit represented by the following general formula (6).
  • R 5 and R 6 each represent an alkyl group having 1 to 6 carbon atoms or a phenyl group, and may be identical to or different from each other
  • R 7 to R 10 each represent an alkyl group having 1 to 6 carbon atoms or a phenyl group, or preferably a methyl group
  • R 7 to R 10 may be identical to or different from one another
  • R 11 represents a divalent organic group containing an aliphatic or aromatic group, or preferably a divalent group represented by any one of the following formulae.
  • Z′ represents a single bond, an alkylene group having 1 to 20 carbon atoms, an alkylidene group having 2 to 20 carbon atoms, a cycloalkylene group having 5 to 20 carbon atoms, a cycloalkylidene group having 5 to 20 carbon atoms, or a —SO 2 —, —SO—, —S—, —O—, or —CO— bond, or preferably an isopropylidene group, and e and f each represent an integer of 0 to 4, or preferably 0.
  • n represents an integer of 1 to 500, preferably 5 to 200, more preferably 15 to 300, or still more preferably 30 to 150.
  • the aromatic PC—POS copolymer can be produced by, for example, a method involving: dissolving a polycarbonate oligomer (hereinafter abbreviated as “PC oligomer”) of which the polycarbonate segment is constituted and a polyorganosiloxane having a reactive group —R 11 —OH (where R 11 has the same meaning as that described above) at a terminal (reactive POS) of which the polyorganosiloxane segment is constituted, the PC oligomer and the reactive POS being produced in advance, in a solvent such as methylene chloride, chlorobenzene, or chloroform; adding an alkali hydroxide solution of a dihydric phenol to the solution; and subjecting the mixture to an interfacial polycondensation reaction with a tertiary amine (such as triethylamine) or a quaternary ammonium salt (such as trimethylbenzylammonium chloride) as a catalyst in the presence of
  • Examples of the phenol compound represented by the above general formula (7) used in the production of the aromatic PC—POS copolymer include the same compounds as the exemplified compounds of the general formula (3).
  • the content of the above polyorganosiloxane segment is preferably 0.2 to 10 mass % with respect to the aromatic PC—POS copolymer, and is preferably 0.1 to 5 mass % in the thermoplastic resin composition of the present invention.
  • the PC oligomer used in the production of the aromatic PC—POS copolymer can be easily produced by, for example, a reaction between a dihydric phenol and a carbonate precursor such as phosgene or a carbonate compound, or an ester exchange reaction between the dihydric phenol and a carbonate precursor such as diphenyl carbonate in a solvent such as methylene chloride.
  • any one of the same compounds as the exemplified compounds of the general formula (2) can be used as the dihydric phenol, and 2,2-bis(4-hydroxyphenyl)propane (bisphenol A) out of the compounds is preferred.
  • Any one of the same compounds as the exemplified compounds can be used as the carbonate compound.
  • the PC oligomer may be a homopolymer using one kind of the above dihydric phenols, or may be a copolymer using two or more kinds of them. Further, a thermoplastic, randomly branched polycarbonate obtained by using a polyfunctional aromatic compound and any one of the above dihydric phenols in combination is permitted.
  • branching agent polyfunctional aromatic compound
  • 1,1,1-tris(4-hydroxyphenyl)ethane 1,1,1-tris(4-hydroxyphenyl)ethane, ⁇ , ⁇ ′, ⁇ ′′-tris(4-hydroxyphenyl)-1,3,5-triisopropylbenzene, 1-[ ⁇ -methyl- ⁇ -(4′-hydroxyphenyl)ethyl]-4-[ ⁇ ′, ⁇ ′-bis( 4 ′′-hydroxy phenyl)ethyl]benzene, phloroglucine, trimellitic acid, isatinbis(o-cresol), or the like.
  • the aromatic PC—POS copolymer which can be produced as described above, is generally produced as an aromatic polycarbonate containing a polycarbonate-polyorganosiloxane copolymer because an aromatic polycarbonate is produced as a by-product.
  • aromatic PC—POS copolymer produced by the above method practically has the aromatic terminal group represented by the general formula (4) at one side, or each of both sides, of any one of its molecules.
  • the component (A) in the present invention is compounded at a content of 5 to 89.95 mass % in the total amount of the components (A) to (E).
  • the content is preferably 10 to 80 mass %, or more preferably 10 to 75 mass %.
  • the component when a silicone-copolymerized polycarbonate is compounded as the component (A), the component is compounded at a content of preferably 5 to 50 mass %, or more preferably 10 to 40 mass % in the total amount of the components (A) to (E).
  • At least one kind selected from a polylactic acid, copolymers of lactic acids and other hydroxycarboxylic acids, and a polybutylene succinate is preferably used as the aliphatic polyester (B) of the present invention from the viewpoint of the reduction of an environmental load.
  • the polylactic acid is typically synthesized from a cyclic dimer of lactic acid called a lactide by ring-opening polymerization.
  • a production method for the polylactic acid is disclosed in, for example, U.S. Pat. No. 1,995,970 A, U.S. Pat. No. 2,362,511 A, or U.S. Pat. No. 2,683,136 A.
  • copolymers of the lactic acids and the other hydroxycarboxylic acids are each typically synthesized from the lactide and a cyclic ester intermediate of a hydroxycarboxylic acid by ring-opening polymerization.
  • a production method for each of the copolymers is disclosed in, for example, U.S. Pat. No. 3,635,956 A or U.S. Pat. No. 3,797,499 A.
  • a lactic acid-based resin having a degree of polymerization suitable for the present invention is obtained by polymerization according to the following method. That is, any one of the lactic acids, and as required, any other hydroxycarboxylic acid are subjected to azeotropic dehydration condensation in the presence of preferably an organic solvent, or especially a phenyl ether-based solvent. Further, water is particularly preferably removed from the solvent as a distillate obtained by the azeotropy, and the solvent brought into a substantially anhydrous state is returned to a reaction system.
  • Any one of L- and D-lactic acids, a mixture of the lactic acids, and the lactide as the dimer of lactic acid can be used as one of the lactic acids as raw materials.
  • examples of the other hydroxycarboxylic acids that can be used in combination with the lactic acids include glycolic acid, 3-hydroxybutyric acid, 4-hydroxybutyric acid, 4-hydroxyvaleric acid, 5-hydroxyvaleric acid, and 6-hydroxycaproic acid.
  • cyclic ester intermediates of hydroxycarboxylic acids such as glycolide as the dimer of glycolic acid and ⁇ -caprolactone as the cyclic ester of 6-hydroxycaproic acid can each be used.
  • a proper additive such as a molecular weight modifier, a branching agent, or any other modifying agent can also be compounded.
  • One kind of the lactic acids may be used alone, or two or more kinds of them may be used in combination. The same holds true for the hydroxycarboxylic acids as copolymer components. Further, two or more kinds of the resultant lactic acid-based resins may be used as a mixture.
  • Natural product-derived polylactic acids are excellent candidates for the aliphatic polyester as the component (B) used in the present invention because of their fluidity, and thermal and mechanical properties. Of those, one having a weight-average molecular weight of 30,000 or more is preferred.
  • the term “weight-average molecular weight” as used herein refers to a molecular weight measured by gel permeation chromatography in terms of polymethyl methacrylate (PMMA).
  • the component (B) in the present invention is compounded at a content of 5 to 60 mass % in the total amount of the components (A) to (E).
  • the content is preferably 10 to 60 mass %, or more preferably 25 to 50 mass %.
  • thermoplastic resin composition of the present invention is a resin composition containing the talc (C).
  • the incorporation of the component (C) can improve the flame retardancy.
  • the talc as the component (C) in the present invention is a water-containing silicate of magnesium, and a general commercially available product can be used as the component.
  • the component is preferably of a plate shape, though its shape is not particularly limited to such an extent that an object of the present invention is achieved.
  • the component (C) preferably has an average particle diameter of 0.1 to 50 ⁇ m.
  • One having an average particle diameter of 0.2 to 20 ⁇ m is particularly suitably used.
  • the component (C) in the present invention is compounded at a content of 5 to 30 mass % in the total amount of the components (A) to (E).
  • the content is preferably 5 to 25 parts by mass, or more preferably 10 to 25 parts by mass.
  • thermoplastic resin composition of the present invention is a resin composition containing the functional group-containing silicone compound (D).
  • the resin composition contains the component (D)
  • a molded article having improved flame retardancy, improved impact resistance, and a good external appearance can be obtained.
  • the component (D) in the present invention is preferably a functional group-containing organopolysiloxane compound, and examples of the compound include organopolysiloxane polymers and/or copolymers each having a basic structure represented by the following general formula (8).
  • R 12 represents a functional group
  • R 13 represents a hydrocarbon group having 1 to 12 carbon atoms
  • g and h represent numbers satisfying the relationships of 0 ⁇ g ⁇ 3, 0 ⁇ h ⁇ 3, and 0 ⁇ g+h ⁇ 3.
  • the compound contains an alkoxy group, an aryloxy group, a polyoxyalkylene group, a hydrogen group, a hydroxyl group, a carboxyl group, a silanol group, an amino group, a mercapto group, an epoxy group, a vinyl group, or the like as a functional group.
  • an alkoxy group, a hydrogen group, a hydroxyl group, an epoxy group, and a vinyl group are preferred.
  • Organopolysiloxane polymers and/or copolymers each having a plurality of functional groups, and organopolysiloxane polymers and/or copolymers each having different functional groups can also be used in combination as those functional groups.
  • organopolysiloxane polymers and/or copolymers each having a basic structure represented by the above general formula (8) are each such that a molar ratio “functional group (R12)/hydrocarbon group (R13)” is typically 0.1 to 3, or preferably about 0.3 to 2.
  • Those functional group-containing silicone compounds which are liquids, powders, and the like, each preferably have good dispersibility in melting and kneading.
  • liquid compounds each having a dynamic viscosity at room temperature of about 10 to 500,000 mm 2 /sec.
  • thermoplastic resin composition of the present invention has the following characteristics. That is, even when the functional group-containing silicone compound is a liquid, the compound is uniformly dispersed in the resin composition, and bleeds to a small extent at the time of molding or to the surface of the molded article.
  • the component (D) in the present invention is compounded at a content of 0.05 to 3 mass % in the total amount of the components (A) to (E).
  • a content is less than 0.05 mass %, improving effects on, for example, the flame retardancy and the impact resistance cannot be expressed.
  • the content exceeds 3 mass %, the impact resistance reduces and an external appearance upon molding deteriorates.
  • the content is preferably 0.1 to 2.5 mass %, or more preferably 0.3 to 2.5 mass %.
  • a mass ratio of the component (D) to the component (B) “component (D)/component (B)” must be 0.003 to 0.6.
  • the ratio is less than 0.003, the flame retardancy cannot be imparted, the impact resistance and the heat resistance become insufficient, and the external appearance upon molding deteriorates.
  • the ratio exceeds 0.6, the impact resistance reduces and the external appearance upon molding deteriorates.
  • the ratio is preferably 0.005 to 0.3, or more preferably 0.01 to 0.2.
  • the polytetrafluoroethylene (E) can be added to the thermoplastic resin composition of the present invention as required.
  • the incorporation of the component (E) can impart a molten drip-preventing effect and improve the flame retardancy.
  • the component (E) in the present invention is not particularly limited as long as the component has a fibril-forming ability.
  • fibril-forming ability refers to such a tendency that the molecules of the resin are bonded to each other so as to be of a fibrous shape by an external action such as a shearing force.
  • the component (E) of the present invention include a polytetrafluoroethylene and a tetrafluoroethylene-based copolymer (such as a tetrafluoroethylene/hexafluoropropylene copolymer). Of those, the polytetrafluoroethylene is preferred.
  • a PTFE having the fibril-forming ability has an extremely large molecular weight, and its number-average molecular weight determined from a standard specific gravity is typically 500,000 or more, or preferably 500,000 to 10,000,000.
  • the PTFE can be obtained by polymerizing tetrafluoroethylene in an aqueous solvent in the presence of sodium, potassium, or ammonium peroxydisulfide under a pressure of about 7 to 700 kPa at a temperature of about 0 to 200° C., or preferably 20 to 100° C.
  • a PTFE in the form of an aqueous dispersion as well as a solid can be used, and one classified into Type 3 according to the ASTM standard can be used.
  • Commercially available products classified into Type 3 are, for example, a Teflon (registered trademark) 6-J (trade name, manufactured by DU PONT-MITSUI FLUOROCHEMICALS COMPANY, LTD.), and a Polyflon D-1 and a Polyflon F-103 (trade names, manufactured by Daikin Industries, Ltd.).
  • commercially available products classified into types except Type 3 are, for example, an Algoflon F5 (trade name, manufactured by Montefluos) and a Polyflon MPAFA-100 (trade name, manufactured by Daikin Industries, Ltd.).
  • One kind of the above PTFEs each having the fibril-forming ability may be used alone, or two or more kinds of them may be used in combination.
  • the component (E) in the present invention is preferably added at a content of about 0 to 2 mass % in the total amount of the components (A) to (E).
  • the component (E) is added for additionally improving the flame retardancy of the thermoplastic resin composition of the present invention.
  • no larger improving effect on the flame retardancy is obtained even when the component is added at a content in excess of 2 mass %.
  • pellets can be stably produced because the impact resistance and moldability (external appearance of a molded article) of the resin composition do not risk being adversely affected, and the resin composition can be favorably ejected even at the time of kneading extrusion.
  • Silica can be added to the thermoplastic resin composition of the present invention as required.
  • the addition of the silica can improve the flame retardancy.
  • the silica to be added is preferably a high-purity anhydrous silica preferably having an SiO 2 content of more than 99.5%, an average particle diameter of 50 nm or less, and a specific surface area of about 50 to 400 m 2 /g.
  • Such silica is easily available as aerosil or colloidal silica.
  • the component is not particularly limited as long as the component is such silica as described above.
  • the silica is preferably added at a content of about 0 to 1 mass % in the thermoplastic resin composition. When the content exceeds 1 mass %, an improving effect on the flame retardancy cannot be expressed.
  • a product prepared by dispersing the silica in a solvent such as water or ethylene glycol at a content of about 5 to 50 mass % can also be used.
  • thermoplastic resin composition of the present invention in addition to the above components (A) to (E) and silica as required to such an extent that an object of the present invention is not impaired.
  • thermoplastic resin composition of the present invention can be obtained by: compounding the aromatic polycarbonate resin (A), the aliphatic polyester (B), the talc (C), and the functional group-containing silicone compound (D), and the polytetrafluoroethylene (E), silica, and an additive, and an inorganic filler to be used as required according to an ordinary method; and melting and kneading the mixture.
  • the compounding and the kneading in this case can each be performed with an instrument that is typically used such as a ribbon blender, a Henschel mixer, a Banbury mixer, a drum tumbler, a uniaxial screw extruder, a biaxial screw extruder, a co-kneader, or a multi-axial screw extruder.
  • An instrument that is typically used such as a ribbon blender, a Henschel mixer, a Banbury mixer, a drum tumbler, a uniaxial screw extruder, a biaxial screw extruder, a co-kneader, or a multi-axial screw extruder.
  • a proper heating temperature in the melting and kneading is typically 240 to 280° C.
  • thermoplastic resin composition of the present invention can be turned into a molded article by applying a known molding method such as hollow molding, injection molding, extrusion molding, vacuum molding, air-pressure molding, heat bending molding, compression molding, calender molding, or rotational molding.
  • a known molding method such as hollow molding, injection molding, extrusion molding, vacuum molding, air-pressure molding, heat bending molding, compression molding, calender molding, or rotational molding.
  • the thermoplastic resin composition of the present invention is excellent in flame retardancy and heat resistance, and can provide a molded article having good external appearance upon molding.
  • the thermoplastic resin composition is suitably used in sites requested to have those characteristics such as parts for OA instruments, electrical and electronic instruments, and communication instruments, and can be utilized in the fields of, for example, optical members and automobiles.
  • the present invention also provides a molded article obtained by using the thermoplastic resin composition of the present invention, or especially a casing for an OA instrument, electrical and electronic instrument, or communication instrument.
  • A1900 A bisphenol A polycarbonate A1900 (manufactured by Idemitsu Kosan Co., Ltd.) having a viscosity-average molecular weight of 19,000
  • PC—POS copolymer An aromatic polycarbonate-polyorganosiloxane copolymer having a viscosity-average molecular weight of 17,000 and a polydimethylsiloxane content of 4.0 mass %, and prepared in conformity with Production Example 4 of JP 2002-12755 A
  • GSP1a A polybutylene succinate, AZ81T (manufactured by Mitsubishi Chemical Corporation)
  • Talc 1 A TP-A25 (manufactured by Fuji Talc Industrial Co., Ltd.)
  • Talc 2 An HT-7000 (manufactured by Harima Chemicals, Inc.)
  • Silicone 1 methyl phenyl silicone containing vinyl group and methoxy group, KR511 (manufactured by Shin-Etsu Chemical Co., Ltd.)
  • Silicone 2 methyl hydrogen silicone, KF-99 (manufactured by Shin-Etsu Chemical Co., Ltd.)
  • Silicone 3 silicone having no functional group, SH200 (manufactured by Dow Corning Toray Co., Ltd.)
  • PTFE A CD076 (manufactured by ASAHI GLASS CO., LTD.)
  • the resultant pellets were dried at 120° C. for 5 hours. After that, the pellets were subjected to injection molding with an injection molder at a cylinder temperature of 240° C. and a mold temperature of 80° C. Thus, test pieces were obtained.
  • test pieces each having a thickness of 1.2 mm or 1.5 mm produced in conformity with the UL standard 94.
  • the test pieces were evaluated for their grades of the UL 94 flammability classes (V-0, V-1, and V-2 in order of decreasing flame retardancy) on the basis of the results of the test, and those not corresponding to these flammability classes were regarded as being nonstandard.
  • a square plate measuring 140 mm long by 140 mm wide by 3 mm thick was molded and visually observed.
  • the case where the square plate was free of any flow mark or silver was represented by o
  • the case where a flow mark or silver was slightly observed was represented by ⁇
  • the case where an external appearance failure such as silver occurred was represented by x.
  • Measurement was performed with a test piece having a thickness of 3.2 mm (1 ⁇ 8 inch) produced with an injection molder in conformity with the ASTM standard D-256.
  • a deflection temperature under load was measured in accordance with a measurement method described in JIS K 7191 under a load of 1.8 MPa at a temperature of 23° C.
  • Tables 1 and 2 show the following.
  • the present invention enabled the provision of a thermoplastic resin composition having improved flame retardancy and improved impact resistance, and excellent in balance among properties including chemical resistance and heat resistance. Further, the use of the thermoplastic resin composition of the present invention enabled the provision of a molded article having less external appearance failure.
  • thermoplastic resin composition of the present invention has improved flame retardancy and improved impact resistance by using a polylactic acid or the like as a polyester resin without using any flame retardant agent.
  • thermoplastic resin composition of the present invention is excellent in chemical resistance and heat resistance, and can provide a molded article having a good external appearance upon molding. Accordingly, the thermoplastic resin composition can be widely used in the fields of, for example, optical members and automobiles. Further, the thermoplastic resin composition can be suitably used in the production of casings for OA instruments, electrical and electronic instruments, and communication instruments.
US12/991,291 2008-05-07 2009-04-30 Thermoplastic resin composition, and molded article Abandoned US20110060089A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2008121605A JP5368728B2 (ja) 2008-05-07 2008-05-07 熱可塑性樹脂組成物及び成形体
JP2008-121605 2008-05-07
PCT/JP2009/058514 WO2009136593A1 (ja) 2008-05-07 2009-04-30 熱可塑性樹脂組成物及び成形体

Publications (1)

Publication Number Publication Date
US20110060089A1 true US20110060089A1 (en) 2011-03-10

Family

ID=41264648

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/991,291 Abandoned US20110060089A1 (en) 2008-05-07 2009-04-30 Thermoplastic resin composition, and molded article

Country Status (5)

Country Link
US (1) US20110060089A1 (ja)
JP (1) JP5368728B2 (ja)
KR (1) KR20100135890A (ja)
CN (1) CN102015894A (ja)
WO (1) WO2009136593A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110060088A1 (en) * 2008-05-07 2011-03-10 Idemitsu Kosan Co., Ltd. Thermoplastic resin composition, and molded article
EP3159367A4 (en) * 2014-12-04 2018-03-28 LG Chem, Ltd. Copolycarbonate resin composition and article comprising same

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110313114A1 (en) * 2009-03-06 2011-12-22 Nec Corporation Polysiloxane-modified polylactic acid composition, composition utilizing same, molded article, and production method
CN102352259B (zh) * 2011-08-31 2013-10-23 金发科技股份有限公司 一种液晶聚合物组合物及其制备方法与应用
US9309403B2 (en) * 2012-10-17 2016-04-12 Polyone Corporation Heat resistant, flame retardant polylactic acid compounds
JP6435817B2 (ja) * 2014-12-03 2018-12-12 三菱ケミカル株式会社 熱可塑性樹脂組成物、成形体及び住宅設備
CN104761878B (zh) * 2015-04-08 2016-08-17 中国科学院化学研究所 一种聚碳酸酯复合材料及其制备方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5449710A (en) * 1993-05-18 1995-09-12 Idemitsu Petrochemical Co., Ltd. Flame retardative polycarbonate resin composition
WO2005075564A1 (ja) * 2004-02-06 2005-08-18 Unitika Ltd. 樹脂組成物およびそれを成形してなる成形体
WO2006062031A1 (ja) * 2004-12-06 2006-06-15 Idemitsu Kosan Co., Ltd. ポリカーボネート樹脂組成物及び成形体
WO2007083820A1 (ja) * 2006-01-18 2007-07-26 Teijin Chemicals Ltd. 樹脂組成物、成形品およびこれらの製造方法
US20070197740A1 (en) * 2004-05-11 2007-08-23 Idemitsu Kosan Co., Ltd., Polycarbonate Resin Composition And Molded Article
US20070299169A1 (en) * 2004-07-20 2007-12-27 Yoji Ohira Aromatic Polycarbonate Resin Composition and Manufacturing Process Thereof
US8227060B2 (en) * 2005-05-12 2012-07-24 Mitsui Chemicals, Inc. Lactic acid polymer composition, molded article comprising the composition and process for producing the molded article

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001002943A (ja) * 1999-06-22 2001-01-09 Mitsubishi Engineering Plastics Corp 熱可塑性樹脂組成物
JP4473675B2 (ja) * 2004-08-09 2010-06-02 出光興産株式会社 ポリ乳酸類用難燃剤、ポリ乳酸類組成物及びそれを用いた成形体
JP4746891B2 (ja) * 2005-02-24 2011-08-10 出光興産株式会社 難燃性樹脂組成物及びその成形体
JP5166699B2 (ja) * 2006-01-19 2013-03-21 帝人化成株式会社 芳香族ポリカーボネート樹脂組成物
JP4896529B2 (ja) * 2006-01-20 2012-03-14 帝人化成株式会社 芳香族ポリカーボネート樹脂組成物からなるｏａ機器外装部品
JP2007211112A (ja) * 2006-02-08 2007-08-23 Mitsubishi Chemicals Corp 熱可塑性樹脂組成物および樹脂成形品
JP5326232B2 (ja) * 2007-06-29 2013-10-30 東レ株式会社 樹脂組成物ならびにそれからなる成形品
JP2009051989A (ja) * 2007-08-29 2009-03-12 Mitsubishi Engineering Plastics Corp 熱可塑性樹脂組成物および樹脂成形品

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5449710A (en) * 1993-05-18 1995-09-12 Idemitsu Petrochemical Co., Ltd. Flame retardative polycarbonate resin composition
WO2005075564A1 (ja) * 2004-02-06 2005-08-18 Unitika Ltd. 樹脂組成物およびそれを成形してなる成形体
US20070197740A1 (en) * 2004-05-11 2007-08-23 Idemitsu Kosan Co., Ltd., Polycarbonate Resin Composition And Molded Article
US20070299169A1 (en) * 2004-07-20 2007-12-27 Yoji Ohira Aromatic Polycarbonate Resin Composition and Manufacturing Process Thereof
WO2006062031A1 (ja) * 2004-12-06 2006-06-15 Idemitsu Kosan Co., Ltd. ポリカーボネート樹脂組成物及び成形体
US20090239983A1 (en) * 2004-12-06 2009-09-24 Idemitsu Kosan Co., Ltd. Polycarbonate resin composition and molded body
US8227060B2 (en) * 2005-05-12 2012-07-24 Mitsui Chemicals, Inc. Lactic acid polymer composition, molded article comprising the composition and process for producing the molded article
WO2007083820A1 (ja) * 2006-01-18 2007-07-26 Teijin Chemicals Ltd. 樹脂組成物、成形品およびこれらの製造方法
US20100227963A1 (en) * 2006-01-18 2010-09-09 Teijin Chemicals Ltd. Resin composition, molded article, and production methods thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Machine translated English equivalent of JP 2006-232956 (9/2006, 18 pages). *
Mchine translated English Equivalent of WO 2005/075564 (8-2005, 27 pages). *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110060088A1 (en) * 2008-05-07 2011-03-10 Idemitsu Kosan Co., Ltd. Thermoplastic resin composition, and molded article
EP3159367A4 (en) * 2014-12-04 2018-03-28 LG Chem, Ltd. Copolycarbonate resin composition and article comprising same
EP3181610A4 (en) * 2014-12-04 2018-05-16 LG Chem, Ltd. Polycarbonate-based resin composition and molded article comprising same

Also Published As

Publication number Publication date
WO2009136593A1 (ja) 2009-11-12
JP2009270008A (ja) 2009-11-19
CN102015894A (zh) 2011-04-13
JP5368728B2 (ja) 2013-12-18
KR20100135890A (ko) 2010-12-27

Similar Documents

Publication Publication Date Title
JP5021192B2 (ja) ポリカーボネート樹脂組成物及び成形体
US20110060089A1 (en) Thermoplastic resin composition, and molded article
US7504452B2 (en) Polycarbonate resin composition and molded article
US20130317143A1 (en) Flame retardant polycarbonate compositions, methods of manufacture thereof and articles comprising the same
JP4746891B2 (ja) 難燃性樹脂組成物及びその成形体
JP5021252B2 (ja) ポリカーボネート樹脂組成物及び成形体
US20100204390A1 (en) Thermoplastic resin composition and molded body obtained from the same
JP5276765B2 (ja) 芳香族ポリカーボネート樹脂組成物及びそれを用いた成形体
US20110060088A1 (en) Thermoplastic resin composition, and molded article
US7217757B2 (en) Thermoplastic resin and formed product
JP4993866B2 (ja) 熱可塑性樹脂組成物および成形体
US20030027928A1 (en) Polycarbonate resin composition
JP5342804B2 (ja) 芳香族ポリカーボネート樹脂組成物およびその成形体
JP2016029142A (ja) 熱伝導性ポリカーボネート樹脂組成物及び成形品
JP6389090B2 (ja) 熱伝導性ポリカーボネート樹脂組成物及び成形品
JP6276019B2 (ja) ポリカーボネート樹脂組成物
JP5086499B2 (ja) ポリカーボネート樹脂組成物及び成形品
JP4473675B2 (ja) ポリ乳酸類用難燃剤、ポリ乳酸類組成物及びそれを用いた成形体
JP6173906B2 (ja) 熱伝導性ポリカーボネート樹脂組成物及び成形品
JP4691316B2 (ja) ポリカーボネート樹脂組成物及び射出成形体
JP2015089893A (ja) 熱伝導性ポリカーボネート樹脂組成物及び成形品
JP4478300B2 (ja) ポリカーボネート樹脂組成物及び成形品
US20240002657A1 (en) Polycarbonate composition, method for the manufacture thereof, and articles formed therefrom
US20240010833A1 (en) Polycarbonate composition, method for the manufacture thereof, and articles formed therefrom

Legal Events

Date Code Title Description
AS Assignment

Owner name: IDEMITSU KOSAN CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HAYATA, YUSUKE;REEL/FRAME:025349/0164

Effective date: 20101026

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION